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Title:
DIRECTIONAL COUPLER AND MICROWAVE HEATING DEVICE PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2019/203170
Kind Code:
A1
Abstract:
This directional coupler is provided with an opening part and a coupling line. The opening part has a first long hole and a second long hole which, in a planar view, are disposed at positions not intersecting with the tube axis of a waveguide tube but which themselves intersect with each other. The coupling line is provided with a first transmission line and a second transmission line. The first transmission line has a first intersection-line part. The first intersection-line part is formed, in a planar view, from one end of the tubular axis, passes an opening intersection part where the first and second long holes intersect with each other, extends in such a manner as to increasingly separate from the tubular axis with a decrease in distance to a perpendicular line orthogonal to the tubular axis, and intersects with the first long hole at a position further apart from the tubular axis as compared with the opening intersection part. The second transmission line has a second intersection-line part. The second intersection-line part, in a planar view, extends in such a manner as to increasingly separate from the tubular axis with a decrease in distance from the other end of the tubular axis toward the perpendicular line, and intersects with the second long hole at a position further apart from the tubular axis as compared with the opening intersection part. The first transmission line and the second transmission line are connected to each other, in a planar view, at a position outside the range of the opening part.

Inventors:
KUBO Masayuki
YOSHINO Koji
SADAHIRA Masafumi
NAKAMURA Hideki
Application Number:
JP2019/016074
Publication Date:
October 24, 2019
Filing Date:
April 15, 2019
Export Citation:
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Assignee:
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. (1-61, Shiromi 2-chome Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
International Classes:
H01P5/18; H05B6/70
Domestic Patent References:
WO2014119333A12014-08-07
Foreign References:
JPH08288705A1996-11-01
Attorney, Agent or Firm:
KAMATA Kenji et al. (1-61, Shiromi 2-chome, Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
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